Combined mud guard and advertising device.



pair of valves is connected by tube 46 to the tracker bar 45 and hascommunication with the tracker opening 46, for admitting atmospheric airto the tube 46 when the perforations 44 and 46 in the note sheet 47register with the tracker openings 44 and 46.

In operation, when one of the perforations 44 of the note sheet 47 isbrought into register with the tracker bar opening 44*, air is admittedto the tube 44 and through the con necting block 30 of the forwardvalve, as

shown in Fig. 1, into the tube 43, which leads to the pocket 14 of therear valve by way of the duct 15. Air being thus admitted to the pocket14, and the exhaust chamber 23 being above the diaphragm or pouch 17,raises the latter momentarily to unseat the valve 27 and establishcommunication between the exhaust chamber 23 and the pneumatic 38,through the tube 37, nipple 36, and duct 35. Then the valve 27 is thusraised its upper face seats against the cap plate 12, closes theatmospheric opening 31 to the valve chamher, and also closes the passage32 which leads down through the connecting block 30 from the trackertube 46. As the tracker tube 46 is closed, and as the passage 32 isclosed by the valve 27, the tube 42 is placed under vacuum by reason 0tits connection with the nipple 16, which leads through channel 15 intothe pocket 14 of the front valve, which pocket 14 is exhausted of airthrough the bleed hole 24 in the diaphragm 17. Thus the diaphragm 17 ofthe front valve is permitted to fall and the valve 27 above thediaphragm is permitted to seat.

The seating of the valve 27 closes communication between the pneumatic39, connected to the front valve chamber 25 by means of the nipple 36and tube 37, as shown in Fig. 1, whereby the pneumatic 39 is opened tothe atmosphere through the pas sage 31, and is thus permitted to expand.At the same time, the valve 27 uncovers the passage 31 to theatmosphere, and also opens the relatively small passage 32 which leadsto the cross tube 43 to admit air to the pocket 14 of the rear diaphragm17. This permits the rear diaphragm to remain raised, as shown in Fig.1, and to thus hold the rear valve 27 upwardly from its seat 28. Theparts remain in this position until the perforation 46 of the note sheetis brought into registry with the opening 46 in the trackerbar. Whenthis occurs, air is admitted to the tube 46, through connecting block30, into the cross tube 42 and into the front pocket 14. Air being thusadmitted beneath the diaphragm, the suction in the chamber 23 lifts thediaphragm and the valve 27 therewith so as to effect the seating of therear valve and the consequent retaining of the front valve in raisedposition.

It is thus seen that I have provided a pair of main valves which are soconnected together that it is not necessary to provide auxiliary valves,as the main valves themselves act for each other as auxiliary valves.The pneumatics 38 and 39 may be connected to expression devices, slideor other form of valves, or to any other mechanical devices which areadapted to be actuated or controlled from a note sheet.

I claim 1. In pneumatic mechanism, a pair of valves, a pouch for eachvalve, an exhaust chamber communicating with one side of said pouches, apocket communicating with the opposite side of: each pouch, and a ductleading from each pocket and adapted to be opened and closed to theatmosphere by the 1 second valve for holding said second valve to itsseat, and a connection between the second valve and the first valvewhereby to maintain the first valve in unseated position.

5. In pneumatic mechanism, a pair of valves, means to initially open oneof the valves, a connection between said valves adapted to close onevalve upon the opening of the opposite valve, and means between theopposite valve and the first valve to retain the first valve open whenthe second valve is closed. 7

6. In pneumatic mechanism, a valve chest having an exhaust chambertherein, a pair of pneumatics connected to the exhaust chamber, a valvefor each pneumatic controlling communication between the separatepneumatics and the exhaust chamber, means for initially opening one ofthe valves whereby to exhaust one of the pneumatics,

a connection between said valves adapted to E. A. CAMPBELL.

COMBINED MUD GUARD AND ADVERTISING DEVICE.

APPLICATlON FILED SEPT 20. 1915.

1319 244. Patented Mar. 13, 1917. I

WITNESSES INVENTOR.

EDWARD A. CAMPBELL. 1 8W E l ATTORNEY

